Effect of Sr and Y on microstructure and electrical conductivity of BaCeO3

• Main Authors: Siriwan Chokkha, Sutin Kuharuangrong
• Format: Article
• Language: English
• Published: Prince of Songkla University 2013-10-01
• Series: Songklanakarin Journal of Science and Technology (SJST)
• Subjects: impedance spectra; conductivity; citrate gel; BaCeO3
• Online Access: http://rdo.psu.ac.th/sjstweb/journal/35-5/35-5-8.pdf

The compositions of Sr doped BaCeO3 synthesized by citrate gel method have been investigated as a potential protonconducting electrolyte for intermediate temperature solid oxide fuel cell (IT-SOFC). The average grain size of Ba0.9Sr0.1CeO3after sintering at 1,300°C decreased as compared to base material, however it increased with the amount of Sr. The highestgrain conductivity is obtained from Ba0.9Sr0.1CeO3 and its value at 700°C is 8.8610-4 S.cm-1. In addition, Y dopant wasselected to further improve the electrical conductivity of Ba0.9Sr0.1CeO3. The grain boundary conductivity at 700°C ofBa0.9Sr0.1Ce0.9Y0.1O3- is 9.3410-3 S.cm-1.